Thursday
April 24, 2014

Posts by SARA


Total # Posts: 3,533

Chem
I'm doing a vinegar titration lab and i need to know how can my acetic acid in vinegar be affected if a few droops of NaOH solution is not washed down with distilled water

chemistry
THANKS!!!!

chemistry
If 7.00g of CH2 is burned in excess Oxygen, what number of moles is formed with H2O

college algebra
2/5(5x-3) - 1/3(12x-5) 10x/5-3/1(5/5) -12x/3 +5/1(3/3) 2x-3 -4x +5 2x-4x - 3+5 -2x + 2

Math
1) (3xy^2)/(2y) + (4xz)/(3x) 2) (2(x-1))/(4(x+2)) *(3(x^2-4))/(5x-5)

Math
I was wondering if I solved these problems right? Simplify the following: 3xy^2 4xz ______ + ______ = 7xyz 2y 3x _____ 5 2(x-1) 3(x^2-4) ______ * ________ = 6(x-2) 4(x+2) 5x-5 ______ 20 x^2-x-6 3(x^2-4) ________ / __________ = (x-3) (x+5) 7x+7 x^2+6x+5 ______________ 21(x-2)

BIO
It is easy to lament the bad luck that distributed Norway rats and the AIDS virus around the world and the capricious stupidity that brought starlings. However, are we hypocrites for condemning these species and planting a cosmopolitan array of vegetables in our gardens? Why d...

chemistry
pure hydrogen gas is burns gently, combining with the oxygen gas of the air to form water vapor

TEACHER AIDES
which of the following best describes achid who has been abused a]child eager to answer your questions. b]child more mature than other children. c]chid typically forms strong friendships. d]the child may be quiet and tentative. I think its D.

teacher aides
its B.THANKS

teacher aides
which of the following is the best statement about children who are abused a]they most often come from impoverised families. b]they cannot usually be identified by thier appearance. c]they will misbehave more often in the class . d]they are usually between the ages of 2 and 8....

teacher aides
17. Which of the following statements is true in families where domestic violence occurs? A. The children are less likely to be victims of abuse. B. The children may use aggressive behavior when dealing with conflict. C. Girls are affected by the violence more than boys. D. Sc...

teacher aides
3. Which of the following situations is a cultural influence on behavior? A. Mia is expected to baby-sit for her cousin as a family duty. B. Joseph can't get his driver's license until he is 18 years old. C. Maria has an earlier curfew than her older sister. D. Michell...

TEACHER AIDES
8. Which of the following statements is true of joint physical custody? A. Joint physical custody isn't legal in most states. B. Joint physical custody is usually difficult for young children. C. Joint physical custody is usually preferred by the court. D. Joint physical c...

TEACHER AIDES
16. Which of the following sets of factors is most influential in contributing to violence? A. Child abuse and poor nutrition B. Persistent poverty and poor nutrition C. Media violence and poor-quality schools D. Persistent poverty and widespread substance abuse . I think its D.

TEACHER AIDES
THANKYOU.

TEACHER AIDES
13. The stress factor which is likely to cause the most severe behavioral consequences for children is A. living in a stepfamily. B. having a working mother. C. living in persistent poverty. My answer is C.

teacher aides
15. Studies have demonstrated that "latchkey children" A. have no difficulty in caring for themselves. B. are at risk for behaviors related to peer pressure. C. are usually over the age of 14. D. are primarily children who live in the inner city. Is A a correct answer.

teacher aides
8. Which of the following statements is true of joint physical custody? A. Joint physical custody isn't legal in most states. B. Joint physical custody is usually difficult for young children. C. Joint physical custody is usually preferred by the court. D. Joint physical c...

teacher aides
3. Which of the following situations is a cultural influence on behavior? A. Mia is expected to baby-sit for her cousin as a family duty. B. Joseph can't get his driver's license until he is 18 years old. C. Maria has an earlier curfew than her older sister. D. Michell...

teacher aides
until recently, custody decisions were based almost solely on the a]gender of the parent. b]type of employment of the parent. c]age of the child. d]income level of the parent. I think its A.

English
Yes that's true but not an option..

English
What literary device is this, "I owe you a lot of $!"?

English
What literary device is this, "The rotten fruit squashed between my fingers when I squeezed it to hard"?

math
John said that he had been working for the highway department for about 9.75 years. Which of the following could be the actual amount of time, in years, that John had been working for the highway department. f) 9.25 g) 9.35 h) 9.65 i) 9.95

misc.
if something says your pursuing a college degree does that mean your in college are are planning in the future to go to college?

TEACHER AIDE
help me, is C is right answer.

TEACHER AIDE
when determining educational settings,learning challenged students are most often placed in a.resource rooms. b.the nurse's office. c.self contained classrooms. d.psychiatric clinics.

teacher aide
it is B.

teacher aide
A diagnosis of mental retardation means that a child a.can't read or write at a funtional level. b.needs serious learning support in mental ability and behaviour. c.has a mental age equal to his or her chronological age. d.can never funtion in normal society.

teacher aide
THANKYOU.

teacher aide
its A

teacher aide
I think its D.

teacher aide
when working with behaviour disordered children in the classroom,the teacher aide can modify behaviour by a.praising them when they succeed. b.using the same techniques for every student. c.underestimating what the child can do. d.reinforcing the problem behaviour.

teacher aide
its C.

teacher aide
In a regular school, the mainstreaming/inclusion technique is a]used only with visually impaired students. b]often impossible with behaviour disordered students c]frequently a positive experience for regular students. d]impractical for learning challenged children.

Chemistry
what are the concentrations of hydrogen ions and hydroxide ions in a solution that has a oh of 5? *please include work done so I can understand*

teacher aids
In regular school,the mainstreaming/inclusion technique is?

chem
An ethylene glycol solution contains 23.9 g of ethylene glycol (C2H6O2) in 86.9 mL of water. Compute the freezing point and boiling point of the solution. (Assume a density of 1.00 g/mL for water.)

chemistry
Calculate the equilibrium constant for 2CH3OH(l)+3O2(g)->2CO2(g)+4H2O(l)

Math
Is x^2 +4x + 4 + y^2 - 2y + 1 = 25 the equation of a circle? Explain why or why not.

Amer Lit
So for my final exam my teacher gave us a study guide and on it under Unit two: The Contemporary Period (1946-Present) There are key concepts that I have to know and one of them is Realism and Naturalism. I tried searching it but got information not during the time period spec...

chem
What is the isotope of neon that contains 11 neutrons?

chem
i got it!

chem
what is a potential energy curve and how do you know where to label Ea, and ƒ´H??

chem
Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C, 37.51%; H, 4.20%; O, 58.29%. Calculate the empirical formula of citric acid. so i did that and got C6H8O7 but now i need to find the molecular formula and i know you...

chem
What amperage is required to plate out 0.315 mol Cr from a Cr3+ solution in a period of 9.00 hr? im writing the conversions and i started with 9hr -> seconds but where do i go from the seconds to the moles of Cr? i know that we have to use for every mole of Cr there are 3 m...

Math/Algebra
Simplify this expression... x^2-9/x^3-3x^2

Math/algebra
Simplify this expression.. x^2-5x/5x-25

math
Jane and Kathy are playing a game of marbles. In each game the loser gives the other girl a marble. When they are finished Jane had won 15 times and Kathy had 22 more marbles than wen she had started . How many games did they play?

Calculus
I;m sorry, I did not state that very well. I'm still new to calculus. I think I have figured it out. Thank you for responding anyway.

Calculus
For a class project, I have been asked to find the volume of the area bounded by two functions, with cross sections of equilateral triangles. The two functions in question are y = xsinx y = -xsinx , And I need to find the volume that would result if the cross sections were equ...

finance
A Canadian exporter, Victoria Exports, will be receiving six payments of €10,000, ranging from now to 12 months in the future. Since the company keeps cash balances in both Canadian dollars and US dollars, it can choose which currency to change the euros to at the end of ...

finance
The owners’ equity accounts for Octagon Transnational are as follows: Common Stock [$2 par value] $20,000 Capital Surplus 360,000 Retained Earnings 1,173,000 Total owners’ equity $1,553,000 a. If Octagon’s stock currently sells for $50 per share and Octagon decl...

finance
Assume that the export price of a Nissan XTerra from Osaka, Japan is ¥3,750,000. The exchange rate is ¥121.84/$. The forecast rate of inflation in the United States is 2.8% per year and is 0.6% in Japan. a. What is the export price of the XTerra at the beginning of the...

finance
Delphi is the US-based automotive parts supplier that was spun off from General Motors in 2000. With annual sales of over $26 billion, the company has expanded its markets far beyond the traditional automobile manufacturers in the pursuit of a more diversified sales base. As p...

finance
Farah Jeans of San Antonio, Texas is completing a new assembly plant near Guatemala City. A final construction payment of Q8,400,000 is due in six months [“Q” is the symbol for Guatemalan quetzals]. Farah uses 20% per annum as its weighted average cost of capital. To...

Finance
Dzell Printers, Inc. (DZ) of the United States exports computer printers to Brazil, whose currency, the reais (symbol R$) has been trading at R$3.30/US$. Exports to Brazil are currently 100,000 printers per year at the reais equivalent of $140 each. A strong rumor exists that ...

psychology
answer man's answer was correct! i just tried it! dont hesitant to put his answer bc its right :)

Econ/statistics
The monthly earnings of teachers is normally distributed with a mean of $3,000 and the standard deviation of $250. We select a sample of 87 teachers. The sampling distribution of the sample mean has an expected value and standard deviation of: a.) 3,000 and 26.8 b.) 3,000 and ...

Statistics
1. In thinking about doing statistical analysis, the sample mean should be interpreted as: A.)a constant value that is equal to the population mean. B.) a constant value that is approximately equal to the population mean. C.) a random variable that is approximately equal to th...

Biology
4 regulation

math
An airplane is 34 ground miles from the end of the runway and 6 miles high when it begins its approach to the airport. To the nearest mile,what is the distance from the airplane to the end of the runway?

math
a 20 foot ladder leaning against a building makes and angle of 60 degrees with the ground. How far from the base of the building is the foot of the ladder?

Physics
A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 8 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 29 cm away from the pivot. If the person exerts a force of 110 lbs on the crobar, how...

Physics
A crowbar is used to wrench open a wooden crate. The crowbar is situated so that a point 4 cm from the end digging into the box acts as a pivot point. The crobar is gripped on the other side, 35 cm away from the pivot. If the person exerts a force of 114 lbs on the crobar, how...

Physics
A woman is standing on the middle of a ladder that leans up against a building, with an angle of 56 degrees from the ground. The wall is very slippery and the ladder is very light. What is the minimum coefficient of friction needed between the ground and the ladder so that th...

algebra
i forgot how to convert a decimals to a fractions, can u help me solve this: 0.14 percent: 14% fraction: ?

Physics
Step One: Convert rpm to radians per second (12 rpm)(2pi rad/1rev)(1min/60s) = 1.26 rad/s = w Step Two: Determine the Angular Acceleration w = alpha t + w 1.26 rad/s = alpha (9.0 s) + 0 Alpha = 0.140 Step Three: Determine the moment of inertia of the disk and children Moment o...

Physics
Step One: Convert rpm to radians per second (12 rpm)(2pi rad/1rev)(1min/60s) = 1.26 rad/s = w Step Two: Determine the Angular Acceleration w = alpha t + w 1.26 rad/s = alpha (9.0 s) + 0 Alpha = 0.140 Step Three: Determine the moment of inertia of the disk and children Moment o...

Physics
Step One: Convert rpm to radians per second (12 rpm)(2pi rad/1rev)(1min/60s) = 1.26 rad/s = w Step Two: Determine the Angular Acceleration w = alpha t + w 1.26 rad/s = alpha (9.0 s) + 0 Alpha = 0.140 Step Three: Determine the moment of inertia of the disk and children Moment o...

object oriented programming
We want to define a class clockType, to implement the time of day in a program. The time is represented as a set of three integers: one to represent the hours, one to represent the minutes, and one to represent the seconds. We also want to perform the following operations on t...

Chemistry
If the amount of radioactive iodine-123 in a sample decreases from 0.8 g to 0.1 g in 36.2 hours, what is the half-life of iodine-123

Computers
I have project i need your help. this is the Project Description In this project, you will design a complete arithmetic unit of a microprocessor which can do addition, subtraction, multiplication, and division of two 2-bit binary numbers (A1A0 and B1B0). Using a 2x4 decoder wh...

chemistry
Find te Yield of Carbon Dioxide in an Alkaseltzer Reaction. Equation: HCH3COO (Acetic Acid)+ NaHCO3 (Sodium Bicarbonate) -> NaCH3COO+ H20 (water)+ CO2 (Carbon Dioxide) So i know to find the Yield its Actual Yield / Theoretical Yield. How do i find the Theoretical Yield and ...

calculus
sectin 20 what about you?

calculus
thank you alot for your help I was really worried because i have to submit the answer tomorrow and i could not do any thing without your help thank you again

calculus
please can you give me an example?

calculus
Is it possible to find an example of a bounded region in the x, y plane that satisfies the following condition : when you revolve the region about the x axis you obtain a solid that has a volume equals its surface area

calculus
yes he does not care about the unit he just want the value using integration

calculus
Is it possible to find an example of a bounded region in the x, y plane that satisfies the following condition : when you revolve the region about the x axis you obtain a solid that has a volume equals its surface area

math!
Ohhhh ok I get it now.....so if you had a percent of decrease problem you would to the same thing but divide right?

math!
No my teacher said he thought it was like 6 out of 20

math!
Frank had a pretest score of 6, what must his posttest score be for his percent of increase to be 50 percent?

English
How would you describe this question?

L.A. homework
I need help with rewriting the final stanza (before the italized ones) of The Highwayman.

calculus
log (3x-9) = 2log3 - log27+ log(x+3) Solving the euqation using the properties of logarithms How do you do this?

physics
Suppose that 90 g of hot water at a temperature of 75 degrees C is poured into a cavity in a very large block of ice at 0 degrees C. (a) What will be the final temperature of the water in the cavity? (b) What mass of ice must melt in order for the water to cool down to the tem...

geometry
Find the volume of a rectangular solid with the following dimensions: 2ã3 cm x 7ã5 cm x 4ã6 cm.

Physics
When throwing a ball, a pitcher exerts a torque of 150 N m for 0.15 seconds onto their arm before letting go of the ball. With an arm length of 0.9 m with inertia 0.6 kg m2, what is the speed of the ball just after it is released?

Math
can you figure out this problem? 10c+c(c-4)

Chemistry
158.5 mL of a AgNO3 solution at 5.0M was combined with a 3.5M CaCl2 solution. 110.5g of AgCl was recovered. Given that the CaCl2 is the limiting reagent, how many milliliters of the 3.5M CaCl2 solution was used?

Chemistry
A solution is prepared with 50.0 g of HNO3 and 130.0 g of H2O. It has a density of 1.21 g/mL. What is the mass/volume percent?

Chemistry
Label the following reactions as combination, decomposition, displacement, precipitation, or acid-base reaction. Also whether each reaction is a redox or non redox reaction. SO2(g)+H2O(l)-> H2SO3(aq) NH3(aq)+HS(-)(aq)-> NH4(+)(aq)+S(2-) Na2O2(l)-> Na2O(l)+O2(g) 3S(2-)...

Chemistry
A solution is prepared with 50.0g of HNO3 and 130.0g of H2O. It has a density of 1.21g/mL. What is the total volume (mL) of the solution?

algebra
What is the positive difference in the sums of the letters in the words MATH and COUNTS, if each letter is assigned a value as folows: A=1, B=-2, C=3, D=-4,..., Y=25, Z=-26?

algebra
A pair of emirps consists of two prime numbers such that reversing the digits of one number gives the other. How many pairs of two-digit emirps exist such that each number in the pair is greater than 11?

Chemistry
What is the molarity of the solution prepared by diluting 25.0ml of 0.220M NaCl to 75.0ml of final volume?( explain your steps)

Math
solve::: A=1/2(a+b)h

7th grade math
i could draw it, but i cannot write it. :( sorry...

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